Python reads file name to generate list

It is often necessary to read all the image files in a folder .
Use python Wrote a simple code , Read a file with a suffix under a folder , Generate file name as text （csv Format ）

import fnmatch
import os
import pandas as pd
import numpy as np
import sys
InputStra = 'LoveDA/Train/Urban/masks_png' # Relative paths
InputStrb = '*.png'
def ReadSaveAddr(Stra,Strb):
#print(Stra)
#print(Strb)
print("Read :",Stra,Strb)
a_list = fnmatch.filter(os.listdir(Stra),Strb)
print("Find = ",len(a_list))
df = pd.DataFrame(np.arange(len(a_list)).reshape((len(a_list),1)),columns=['Addr'])
df.Addr = a_list
#print(df.head())
df.to_csv('Get.lst',columns=['Addr'],index=False,header=False)
print("Write To Get.lst !")
ReadSaveAddr(InputStra,InputStrb)

The above code is saved as ：image_mask.py
Click on run